WETLAND RESTORATION ON PRIVATE LAND CASE STUDY 4: CASHMORE DISTRICT

This is the fourth of our early works case studies, where we review a trial sandbag structure installed at Cashmore.

This project involved the installation of a temporary sandbag weir in an artificial drain on a private property near Portland, in far south-western Victoria. The temporary weir was constructed using sandbags made from geo-textile material placed to form a weir wall and overflow sill within the existing drainage channel. The trial sandbag structure is designed to function as a drainage regulation weir, where water flowing out of the drainage channel is retained to promote pooling of the backwater into the natural wetland depression located directly upstream. In this instance, the landholder was interested in restoring the natural wetland area – noting that this area had become much drier since the construction of the drain – as the wetland area itself was considered to be of marginal value for agricultural purposes.

The temporary sandbag weir was installed in early June, prior to the above average July rains in that district, being completed by the landholder, members from a local landcare group and Nature Glenelg Trust.  The weir structure has been designed to recreate a 4 hectare wetland area by restricting drainage outflows by up to 60 cm within the existing drainage channel.  NGT’s Lachlan Farrington put together a short summary of the action, which can be viewed below:

Temporary trial weir structures provide both Nature Glenelg Trust and the landholders we work with, with an inexpensive and low risk approach to trialing wetland restoration measures. Once the functionality of the structure and its wetland restoration impact have been assessed by both parties – under real conditions – a permanent structure can be designed and installed according to a set of agreed criteria. In this way, trial structures can provide a valuable (no-obligation) first step, along the path to providing lasting, self-sustaining and effective wetland restoration solutions in the region.

Trial structures are not necessary at every site, but are a good option for people who are tentative about making the leap to a permanent structure, without having the opportunity to see what the potential inundation effect will be first under a range of settings and conditions. If you are interested in having a wetland restoration trial undertaken on your property, please contact us here.

This Case Study is the fourth in a series to illustrate wetland restoration in practice, delivered through Nature Glenelg Trust’s Wetland Restoration Program on Private Land and funded by the Australian Government.

  • Long Swamp Restoration Trial update – October 2017 October 29, 2017 We’re currently busy putting the final touches on an evaluation report that summarises everything we’ve learned about Long Swamp since NGT first became involved with restoration planning and action for this magnificent wetland in Discovery Bay Coastal Park in 2012. Hopefully we’ll be able to share the finished product with you soon… In the mean time, last week ...
  • Success by OneFortyOne in protecting Wedge-tailed Eagle nests October 29, 2017 Ecologists at Nature Glenelg Trust have been monitoring known Wedge-tailed eagle nests within the pine forests of OneFortyOne Plantations over the last few months. This is the second season of monitoring and we covered 12 known nests sites this year, which were checked three times over a period of 6 weeks from July to September. While ...
  • Checking recruitment at threatened orchid re-introduction sites in the South East October 29, 2017 Sheryl and I recently headed out to check on the Little Dip Spider Orchids (Caladenia richardsiorum) that were planted out at various sites in the region in winter 2015. To refresh your memory, these threatened orchids along with three other species were purpose-grown for reintroduction to boost wild populations (more detail here). We visited several sites ...
  • Fine tuning the operation of the restoration trial structures at Glenshera Swamp, Stipiturus CP October 29, 2017 While at Glenshera Swamp for a couple of days in late September, we were able to see precisely how responsive an already wet catchment above the swamp is to small amounts of rainfall – with 8.5 mm of rain falling overnight on the 24th of September. So after our restoration tours wound up at lunch time on the ...
  • Summing up recent wetland restoration tours of Glenshera Swamp, Stipiturus CP October 29, 2017 On the 24th and 25th of September, NGT’s Mark Bachmann and Ben Taylor teamed up with DEWNR’s Randall Johnson to guide visitors around some of the recent restoration works at Stipiturus Conservation Park, 6 km west of Mount Compass. Stipiturus contains most of Glenshera Swamp, the largest and most intact Fleurieu Peninsula Swamp (nationally critically endangered ...
  • Field Naturalists tour of Eaglehawk Waterhole a great success October 29, 2017 The Annual AGM and Campout for the SE Field Naturalist Society was held last weekend at the Black Cockatoo Bush Camp. This campout brings together all Field Naturalist groups from around the region including Mt Gambier, Millicent, Naracoorte and Bordertown. On Saturday Oct 14th the group come out to Eaglehawk Waterhole for a tour around ...
  • Adventures of an NGT Bat Scientist… in Mexico! October 29, 2017 While other NGTers were slogging away in the rain doing reveg and working on other projects this winter, I recently had the pleasure to escape to the Mexican summer for three months! Just a couple of months earlier my interest was piqued by a job ad looking for bat scientists for projects in several exotic locations ...
  • The Wonderful Wetland Ecology Bus Tour October 29, 2017 On the 12th October I was fortunate enough to have a seat on the two-day Wonderful Wetland Ecology Bus Tour, a training course on the ecological drivers of wetlands (geomorphology, hydrology and water quality).  On this tour of wetlands across the Loddon floodplains (North Central Victoria), we were introduced to a suite of different vegetation ...
  • First OBP arrives in Melaleuca from the mainland October 29, 2017 The days are getting longer and warmer and with spring arriving, the Orange-bellied Parrots are getting ready to start their journey back across Bass Strait to Melaleuca in Tasmania. Exactly one week after our last winter survey the first OBP has arrived back in Melaleuca. One healthy male has returned to the breeding grounds in ...
  • NGT wins free in screen promotion at Adelaide 36ers home games! October 29, 2017 While in Adelaide for work a few weeks ago on Wednesday the 4th of October, I entered the “CEO Shootout” for a bit of fun at the Adelaide 36ers home stadium. With about 25 or 30 competitors lining up, expectations were pretty low, but I had nothing to lose… the challenge was to see who could ...

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